Writing instrument



FIG. 1 is a perspective view of a writing instrument showing our new design;

FIG. 2 is a front view of the same FIG. 1;

FIG. 3 is a back view of the same FIG. 1;

FIG. 4 is a a right side view of the same FIG. 1, the left side view being a mirror image of the right side view;

FIG. 5 is a top view of the same FIG. 1; and,

FIG. 6 is a bottom view of the same FIG. 1.

Portions of the writing instrument shown in broken lines are for illustrative purposes only, and form no part of the claimed design. 

We claim the ornamental design for a writing instrument, as shown and described. 